Software MOLDFLOW

NatureWorks s injection moldable grade of Ingeo in the capillary rheometer test has shown a good fit into the Cross-WLF viscosity model (see Table 6.2). There are seven coefficients in the model and it is readily embedded into Moldflow software for injection molding simulation (Moldflow Plastic Labs 2007). Moldflow is computer software that is widely used across the plastic injection molding industry to predict and optimize the... 

Figure 4.51 Simulation of injection molding showing the many drop-down menus of the MOLDFLOW software [44].

Temperature fields are very important to simulate thermal-induced stresses. Compared three software simulated results, ANSYS is better than the two others. The reason is that ANSYS can deal with unsteady temperature fields with multi-material heat transfer properties. To ensure experiments mold temperature uniform, Be-Cu mold plate with good heat transfer property and Bakelite layer with heat insulation feature are used. Special feature of 6.5mm PC plank mold for simulation in this case is that mold material is quite different and thermal and mechanics property parameters should be considered as non-uniform. Unfortunately, non-uniform mold base material can not be calculated by Partmolding and Moldflow software. 

The authors acknowledge the help of Dr. Elizabeth Takacs, McMaster University, and Professor Qian Li, Zhengzhou University, in sample preparation. We thank Professor S. Vengallatore, McGill University, for guidance in using the nanoindenter. Financial support was received from NSERC and McGill University. MOLDFLOW supplied a free licence to use MOLDFLOW software. 

Figure 10.33. Simulation of the flow of recycled PC in extrusion, using the software Compuplast a) and MoldFlow b) to create a rail and a handle for the sign. (Fora color version of this figure, see www.iste.co.uk/hamide/polymers.zip)...

In 1978, Moldflow introduced commercial software on a worldwide computer time-sharing system. This software enabled users to determine process conditions (melt temperature, mold temperature, and injection time) and to balance flow in cavities and runner systems. Although accepted at the time, this software was difficult to use as it required the user to produce a layflat. ... 

Moldflow introduced software for prediction of shrinkage and warpage in 1990. Since this time, analysis of fiber-reinforced materials has been introduced in which the orientation of the fibers in the molding are calculated. With the distribution of fibers known, it is possible to calculate mechanical properties of the composite material in principal directions. This data can then be used in warpage calculations or used for structural analysis of the resulting part. 

SWIS (Moldflow, Kalamazoo, MI). Predicts linear shrinkage and, with unreinforced materials, part warpage. Planned for future commercial release as part of a refined software system. 

Figure 4.53 Modern injection-molding software, such as MOLDFLOW, can handle such complicated shapes as the Kodak Advantix camera [20].

Moldflow Plastics Insight software from Moldflow Corporation was used for simulation of filling, packing, cooling stages, and part warpage. 

The present study attempted to numerically predict residual stress and birefringence in injection molded PC specimens with different thickness, 2.0mm and 6.5mm. Numerical simulations have been done based on a viscoelastic fluid model and commercial software MOLDFLOW by three dimensional finite element methods. The former is used to compute flow-induced residual stress, while the latter for combined residual stresses, including thermal-induced and flow-induced stresses. Effects of processing conditions on the residual are considered by the numerical simulations. As for 2.0mm PC injection molded parts, the predicted residual stresses of viscoelastic model show quite precise in accordance with experimental results. But for 6.5mm PC specimen, Moldflow simulated results have less error. 

The present study combines photoelastic experiments and numerical methods to investigate residual stresses in injection molded polycarbonate samples. There are two types of samples are measured to verify the criterion is valid. Numerical simulations are used to separate thermal-induced stresses and flow-induced stresses, while experiment results are used for comparison. Software named PARTMOLDING in which governing equations include viscoelastic fluid model is developed to calculate flow-induced residual stress mainly. Thermal-induced stresses are simulated by MOLDFLOW MPI5.0. Compared with experiments, it is found that the criterion is helpful to choose appropriate simulation theory, improve simulation precision and reliability. 

Residual stresses in 6.5mm PC plank in ref [8], simulated results by ANSYS were given and discussed neglecting flow-induced stress is valid. In this paper. Partmolding and Moldflow results are presented. Fig 9 is simulated results of 6.5mm PC samples (dimensionless thickness =0.048, bigger than criterion 0.045) which means thermal-induced residual stress is predominant. We use Partmolding software only consider flow-induced stress purposively so simulated error of Partmolding is bigger than that of Moldflow because the former still priorities flow-induced stress. 

The new mould design proved to be efficient for an injection molding visualization tool. Analysis of conventional injection molding and comparisons with Moldflow MPI 5.0 software, showed good agreement for well estabhshed flow patterns. However, signifieant... 

Currently available flow simulation software such as MoldFlow (MF) and M3D can predict the cooling time of conventional injection molds in a rather acceptable way. This means that plastic and mold material characteristics can be involved based on the available possibilities of the related simulation software. It does not immediately accept temperature dependant heat characteristics for mold materials. 

The effect of gate location on process consistency during the injection molding of an automotive bumper is analyzed in this paper. The analyses were performed using Moldflow Plastic Insight version 6.0 and multivariable optimization software based on Data Envelopment Analysis (DEA) previously developed by our group [3, 4, 5]. 

This work was supported by 3M Precision Optics, Inc. The authors wish to thank Moldex3D and Moldflow for making their simulation software available for this study. 

In this study, Moldflow injection molding simulation software was used to predict the flow pattern and injection pressure of a telecom header mold. The results of the simulations were then compared to the actual molded part flow pattern and required injection pressures. 

The CAE Software, namely Moldflow Insight 6.0, was used to find the optimal flow rate, for each material, to fill the disc. Once the first optimal flow rate (71.51 cm /sec.) was found, it was then converted into an injection velocity by dividing the flow rate by the cross-sectional area of the screw, shown below. The optimal injection velocity converted from the flow rate was 8.89 cmisec. 

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